Mounting & tensioning arrangements for screens

Details Mounting & tensioning arrangements for screens Mounting & tensioning arrangements for screens

1996-07-08

1997-04-01

Bollinger, David H.

Classifying, separating, and assorting solids

Sifting

Elements

209405, 209412, B07B 149

Patent

active

056157762

ABSTRACT:
In a vibratory screening apparatus, a withdrawable lower fine mesh screen assembly (17) has a screen unit (19) releasably mounted on a grid/frame structure (20). The screen unit (19) has a sheet (21) of mesh material bonded to a grate or lattice (22) of a yieldable material such as a hard rubber, and this lattice (22) and the edges of the mesh (21) are also fixed to relatively rigid side members (23) which are mutually free each from the others. In the structure (20), a rigid grate of support bars (26) supports the lattice (22) with a sliding contact interface, and a frame (28) incorporates pneumatically actuated tensioners (30) and clamps (34A, 34B) respectively for tensioning/locking the screen unit (19) and coupling the screen assembly to the vibratory structure. The tension in the screen unit (19) is adjustable whilst on the structure (20) by virtue of the yieldability of the lattice (22) and its sliding contact interface with the support bars (26). Away from the screen assembly, the screen unit (19) is relaxed and less vulnerable to damage or deterioration of tensioning quality.

REFERENCES:
patent: 1879377 (1932-09-01), McNeely
patent: 2378463 (1945-06-01), Burls
patent: 3381820 (1968-05-01), Cecka
patent: 3968033 (1976-07-01), Illemann et al.
patent: 4568455 (1986-02-01), Huber et al.
Derwent's Abstract No. 85-85898/14 (Abstract of SU A 1114481.

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